Method for mounting a guide apparatus

Abstract

A method of mounting a guide apparatus of a large hydraulic machine with a vertical axis of rotation and wherein the axes of the guide blades extend vertically as well. The method includes the following steps: assembling an assembly with at least the upper guide wheel ring or the turbine cover and all the guide blades of the guide apparatus. This assembly does not take place in the machine shaft and the guide blades are mounted in a suspended manner, lowering the guide blades to mutually different height levels within the assembly such that the lowered guide blades can be displaced upwardly, installing the lower guide wheel ring in the machine shaft, and installing the assembly in the machine shaft by continuous lowering, wherein the guide blades present in the assembly are successively inserted into the openings provided in the lower guide wheel ring.

The invention claimed is: 
     
       1. A method for mounting a guide apparatus of a large hydraulic machine with a vertical rotational axis in a machine shaft, the method comprising:
 assembling a subassembly that includes at least an upper guide wheel ring and all guide vanes of the guide apparatus, the assembling step being carried out remotely of the machine shaft; 
 mounting the guide vanes in a suspended manner with axes of the guide vanes extending vertically; 
 prior to lowering the subassembly into the machine shaft, lowering the guide vanes to differing heights in relation to each other inside the subassembly so that the lowered guide vanes are displaceably in an upward direction; 
 providing a lower guide wheel ring with openings for insertion of the guide vanes and installing the lower guide wheel ring in the machine shaft; and 
 continuously lowering the subassembly into the machine shaft for installing the subassembly in the machine shaft and, during the lowering, successively inserting the guide vanes that are disposed in the subassembly into the openings provided in the lower guide wheel ring. 
 
     
     
       2. The method for mounting a guide apparatus according to  claim 1 , wherein the subassembly further includes a control mechanism of the guide apparatus. 
     
     
       3. The method for mounting a guide apparatus according to  claim 1 , which comprises lowering two guide vanes of the guide vanes in each case to a common height. 
     
     
       4. The method for mounting a guide apparatus according to  claim 1 , which comprises lowering three guide vanes of the guide vanes in each case to a common height. 
     
     
       5. The method for mounting a guide apparatus according to  claim 1 , which comprises lowering four guide vanes of the guide vanes in each case to a common height. 
     
     
       6. The method for mounting a guide apparatus according to  claim 1 , wherein the step of lowering the guide vanes comprises using spindles for lowering the guide vanes.